Question

i2+S2O32complete equation

Answer 1

2 S2O2−3 → S4O2−6+ 2 e−

I2 + 2 e− → 2 I−

The overall net ionic reaction is:

2 S2O2−3 + I2 → S4O2−6 + 2 I−

The full ionic reaction would be (assuming sodium salts):

2 Na2S2O3 + I2 → Na2S4O6 + 2 NaI